Buggy code:
public class ActionContext extends ActContext . ActContextBase < ActionContext > implements Destroyable , ActContext < ActionContext > , ParamValueProvider { public static final String ATTR_HANDLER = "__act_handler__" ; public static final String REQ_BODY = "_body" ; private String portId ; private Request request ; private Response response ; private Session session ; private Flash flash ; private Set < Map . Entry < String , String [ ] > > requestParamCache ; private Map < String , String > extraParams ; private volatile Map < String , String [ ] > bodyParams ; private volatile JSONObject jsonObject ; private volatile JSONArray jsonArray ; private Map < String , String [ ] > allParams ; private String actionPath ; private Map < String , Object > attributes ; private ActionContext . State state ; private Map < String , Object > controllerInstances ; private List < ISObject > uploads ; private Set < ConstraintViolation > violations ; private Router router ; private RequestHandler handler ; private ActionContext ( App app , H . Request request , H . Response response ) { } public ActionContext . State state ( ) { } public boolean isSessionDissolved ( ) { } public boolean isSessionResolved ( ) { } public Request req ( ) { } public Response resp ( ) { } public Cookie cookie ( String name ) { } public Session session ( ) { } public Flash flash ( ) { } public Router router ( ) { } public ActionContext router ( Router router ) { } @ Override public < T > T renderArg ( String name ) { } @ Override public ActionContext renderArg ( String name , Object val ) { } @ Override public Map < String , Object > renderArgs ( ) { } @ Override public ActionContext templatePath ( String templatePath ) { } public RequestHandler handler ( ) { } public ActionContext handler ( RequestHandler handler ) { } public Format accept ( ) { } public ActionContext accept ( H . Format fmt ) { } public String portId ( ) { } public Locale locale ( ) { } public boolean isJSON ( ) { } public boolean isAjax ( ) { } public ActionContext param ( String name , String value ) { } @ Override public String paramVal ( String name ) { } public String [ ] paramVals ( String name ) { } public Object tryParseJson ( String name , Class < ? > paramType , Class < ? > paramComponentType ) { if ( null == ( jsonObject ) ) { return null ; } Object o = jsonObject . get ( name ) ; if ( null != o ) { if ( o instanceof JSONObject ) { return JSON . parseObject ( ( ( JSONObject ) ( o ) ) . toJSONString ( ) , paramType ) ; } else if ( o instanceof JSONArray ) { return JSON . parseArray ( ( ( JSONArray ) ( o ) ) . toJSONString ( ) , paramComponentType ) ; } else { return o ; } } else { <START_BUG> return jsonObject ; <END_BUG> } } public JSONArray jsonArray ( ) { } private Map < String , String [ ] > bodyParams ( ) { } public Map < String , String [ ] > allParams ( ) { } public List < ISObject > uploads ( ) { } public ActionContext addUpload ( ISObject sobj ) { } public ActionContext __appRenderArgNames ( String names ) { } public List < String > __appRenderArgNames ( ) { } public ActionContext __controllerInstance ( String className , Object instance ) { } public Object __controllerInstance ( String className ) { } public ActionContext attribute ( String name , Object attr ) { } public < T > T attribute ( String name ) { } public < T > T newInstance ( Class < ? extends T > clazz ) { } public < T > T cached ( String key ) { } public void cache ( String key , Object obj ) { } public void cache ( String key , Object obj , int expiration ) { } public void cacheForOneHour ( String key , Object obj ) { } public void cacheForHalfHour ( String key , Object obj ) { } public void cacheForTenMinutes ( String key , Object obj ) { } public void cacheForOneMinute ( String key , Object obj ) { } public void evictCache ( String key ) { } public ActionContext addViolations ( Set < ConstraintViolation < ? > > violations ) { } public ActionContext addViolation ( ConstraintViolation < ? > violation ) { } public boolean hasViolation ( ) { } public Set < ConstraintViolation > violations ( ) { } public StringBuilder buildViolationMessage ( StringBuilder builder ) { } public StringBuilder buildViolationMessage ( StringBuilder builder , String separator ) { } public String violationMessage ( String separator ) { } public String violationMessage ( ) { } public ActionContext flashViolationMessage ( ) { } public ActionContext flashViolationMessage ( String separator ) { } public String actionPath ( ) { } public ActionContext actionPath ( String path ) { } public String templatePath ( ) { } public void resolve ( ) { } public void dissolve ( ) { } @ Override protected void releaseResources ( ) { } public void saveLocal ( ) { } public static void clearLocal ( ) { } private Set < Map . Entry < String , String [ ] > > requestParamCache ( ) { } private void _init ( ) { } private void resolveSession ( ) { } private void resolveFlash ( ) { } private void dissolveSession ( ) { } private void dissolveFlash ( ) { } private static ContextLocal < ActionContext > _local = $ . contextLocal ( ) ; public static final String METHOD_GET_CURRENT = "current" ;

Fix:
return JSON . parseObject ( jsonObject . toJSONString ( ) , paramType ) ;